Turbine driven locomotive



May 26; 1931. J. MaGLEAoD I Y :TURBINE DRIVEN LOCOMOTIVE Filed June 7, 1930 .3 Sheets-Sheet l May-26, 1931. J. MacLEoD I TURBINE DRIVEN LOCOMOTIVE Filed June '7, 1930 3 Sheets-Sheet 2 May 26, 1931. 1 MacLEOD i 1,807,485

TURBINE DRIVEN LOOMOTIVE Filed June 7, 195o s sheets-sheet s QM www Patented May 26, 1931 f '.f

UNITED STATES PATENTSOFFICE JAMES MACLEOD, OF GLASGOW, SCOTLAND TUR-EINE DRIVEN LOOOMOTIVE Application led .Tune 7, 1930, Serial No. 459,792, and in Great Britain April 29, 1929.

This invention relates to turbine-driven cured to a flange b* unitary with the shaft b3. locomotives, having one or more driving S denotes the steam inlet to each turbine axles, in which transmission from the turand E the exhaust therefrom.

` bines to the driving axles is effected through Means is provided for creating a vacuum enclosed rotary gear members and flexible in the ahead and reverse turbines alternately transmission means. depending upon the direction of motion of According to the invention there are assotheV locomotive. For example, such a vacuum ciated with each driving axle an ahead turmay be created by the ejector action of the bine and a reverse turbine both operatively exhaust steam from either turbine alternately y connected to the respective axle through an issuing from exhaust nozzles 7 (Fig. l) con- 60 enclosed rotary gear train and flexible transtained within the main exhaust pipe situated mission means, the rotors of both turbines bein the boiler smoke box 8. The nozzles 7 are ing rigid with a iirst high-speed pinion of the adapted to perform the duel function of creatrespective gear train. ing the necessary induced draught for the A locomotive constructed in accordance boiler furnace and re grate and creating and 65 with `the invention is illustrated diagrammaintaining the vacuum in the idling turbine matically in side elevation in Fig. 1 of the acor turbines. companying drawings. Fig. 2is a plan view As shown in Fig. 1, steam is supplied to of the driving assembly for one axle. Figs. the high pressure turbines by way of a valve- 3 and 4 are detail views of flexible transmiscontrolled pipe 9, and passes from the high 70 sion means. pressure ahead and reverse turbines to the The locomotive shown comprises a wheeled intermediate pressure ahead and reverse turframe 1 having three driving axles 2, 3 and 4. bines by way of pipes 10, and from the in- Within the frame 1 is a gear casing 5 for each termediate turbines to the low pressure ahead driving axle containing toothed rotary gear and reverse turbines by way of pipes 11, be- 75 members journalled for rotation on axes dising finally exhausted to the atmosphere by posed athwart the locomotive. Integral with way of pipes 12 connected to the nozzles 7.

each gear casing 5 are turbine casings 6. The steam and exhaust piping arrangement As shown in Fig. 2, discs 6a and 6b forming, shown is by way of example only, it being unrespectively, ahead and reverse turbine rotors derstood that each or any turbine or turbines S0 may be solid with the overhung ends of a first may be supplied with steam at boiler preshigh speed pinion shaft a presenting a sure; that is to say, the turbines may be condouble-helical pinion a meshing with a nected in series, in parallel, or in series paraldouble-h'elical gear wheel b unitary with a lel arrangement, to the boiler. k,

r double-helical pinion b which in turn meshes I claim: 85

with a double-helical gear wheel b2 integral 1. In a locomotive, in combination with a with a hollow shaft b3 surrounding the drivwheeled' driving axle, a unitary rotary shaft ing axle 4 and journalled coaxially therewith disposed transversely of the locomotive and in the gear casing 5, the gear ratio of the pinhaving overhung ends, an ahead turbine roions and gear wheels being such as to effect tor and a reverse turbine rotor mounted on 9U the required speed reduction. said overhung ends of said shaft, at least one Fitted between each end of the shaft b3 and pinion unitary with said shaft, and a set of the corresponding driving wheel d is flexible rotary gears, and flexible transmission means transmission means (Figs. 8 and 4) comprisbetween said pinion and said axle.

ing helical compression springs e interposed 2. In a locomotive, in combination with a 95 between abutments presented by telescopicalwheeled driving axle, a unitary rotary shaft ly related tubes f3, f4 having, respectively disposed transversely of the locomotive and bulbous ends f1, f2 which enter into ball-andhaving overhung ends and disposed parallel socket engagement with members e1, carried to said axle, an ahead turbine rotor and a by the driving wheel d and members e2 sereverse turbine rotor mounted on said over- 100 hung ends of said shaft, a double helical gear pinion unitary With said shaft, flexible transmission means applied to said axle, and speed reducing gear comprising intermeshing double helical gear Wheels between said pinion and said flexible transmission means.

In testimony whereof I have signed my name to this specification.

JAMES MAGLEOD. 

